1 files changed, 61 insertions, 0 deletions
diff --git a/crontab.c b/crontab.c
new file mode 100644
index 0000000..2b26ebf
--- /dev/null
+++ b/crontab.c
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: ISC */
+#include "gcrond.h"
+
+void cron_tm_to_mask(crontab_t *out, struct tm *t)
+{
+	memset(out, 0, sizeof(*out));
+	out->minute     = 1UL << ((unsigned long)t->tm_min);
+	out->hour       = 1 << t->tm_hour;
+	out->dayofmonth = 1 << (t->tm_mday - 1);
+	out->month      = 1 << t->tm_mon;
+	out->dayofweek  = 1 << t->tm_wday;
+}
+
+bool cron_should_run(const crontab_t *t, const crontab_t *mask)
+{
+	if ((t->minute & mask->minute) == 0)
+		return false;
+
+	if ((t->hour & mask->hour) == 0)
+		return false;
+
+	if ((t->dayofmonth & mask->dayofmonth) == 0)
+		return false;
+
+	if ((t->month & mask->month) == 0)
+		return false;
+
+	if ((t->dayofweek & mask->dayofweek) == 0)
+		return false;
+
+	return true;
+}
+
+void delcron(crontab_t *cron)
+{
+	if (cron != NULL) {
+		free(cron->exec);
+		free(cron);
+	}
+}
+
+int runjob(crontab_t *tab)
+{
+	pid_t pid;
+
+	if (tab->exec == NULL)
+		return 0;
+
+	pid = fork();
+	if (pid == -1) {
+		perror("fork");
+		return -1;
+	}
+
+	if (pid != 0)
+		return 0;
+
+	execl("/bin/sh", "sh", "-c", tab->exec, (char *) 0);
+	perror("runnig shell interpreter");
+	exit(EXIT_FAILURE);
+}